The concept of online category management in the business world in the Croatian market is quite developed. Modern trends have forced many companies to expand their business to the Internet to increase accessibility to the target group while also standing out in the mass of competitors. In addition, in the last three years, the advent of the coronavirus, a pandemic that has ravaged the world and touched every world economy, has brought some new changes. The unknown situation in which the society found itself prompted the design of new business models, emphasizing digitalization, technology, and online business. Websites, apps, and online stores have become a weapon in attracting customers. This paper will explain the role of online category management in all of the above. The concept of category management and the development and application of online category management will be explained through 7 chapters. An example of practice use of the online category management will be shown in the Zara and Mango online stores example. The survey results on the general population's satisfaction with the shopping experience in the Zara and Mango online stores will show the impact of online category management on customers' opinions and decision-making. The conclusion, based on the collected data, will present the findings and suggestions for improvement.